Contributions from the Department of Botany of Columbia University Volume 7, Nos. 151-175

Contributions from the Department of Botany of Columbia University Volume 7, Nos. 151-175

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This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1901 edition. Excerpt: ... Sp. Pl. 1129. I753. Hypnmn Touretii Brid. Sp. Musc. 2: I85. I812. Hypnum illecebrmn Schwaegr. Suppl. I, part 2: 225. I816. Hy/mum blandunt Lyell in Hook. & Tayl. Musc. Brit., Ed. 2: I76. I827. Suppl. pl. 5. I827. Gamietophyte in wide spreading mats, varying from dirty green to bright glossy green: stems 3-10 cm. long, creeping, irregularly divided, irregularly or often subpinnately branching, partially denuded of leaves in the older portions, sparingly radiculose, younger portions ascending and much like the branches: branches short, rarely reaching I cm. in length, julaceous, turgid, ascending to erect, more or less arcuate, usually obtuse: branchleaves appressed imbricate when dry, erect open when moist, varying greatly in shape; those from the middle of the larger branches broadly ovate to oblong-ovate, 1.2 x0.6 mm., abruptly narrowed to a short point, finely and sharply serrate above, sometimes nearly-entire, very concave, slightly sulcate when dry, smooth when moist, not decurrent but half clasping, acumination of leaves often squarrose-spreading when dry; costa extending % the length of the leaf, sometimes ending in a dorsal spine; median cells linear-vermicular, 0.005 mm. wide and 12-18: 1, apical much shorter; basal subquadrate, colored and thicker walled; alar somewhat larger and less deeply colored; leaves of the shorter branches and upper and lower leaves of the longer branches often lack the acumination and are obtuse or obtusely acute: stem leaves averaging larger, in robust plants reaching 2. 3 I mm., gradually tapering to a longer acumination, nearly or quite entire, those of the younger stems scarcely to be distinguished from the branch leaves. Dioicous: perichaetial leaves oblong-lanceolate, gradually narrowed more

Product details

  • Paperback | 120 pages
  • 189 x 246 x 6mm | 227g
  • United States
  • English
  • black & white illustrations
  • 1236990447
  • 9781236990440